Could use help from the group. When engine gets up to temp, only one of the two fans kick in. I know the second fan (passenger side) is good and wired properly because 1) when I went into test mode to reflash it would turn off and on. 2) It kicks in for a second or two on a hot start. Watching the AP in Gauge mode, Fan Switch #1 shows on, but #2 never flips to on.

Do you need to hit a certain temp for both to turn on vs. one? What am I forgetting?